Daikin SUPER MULTI NX G Series Service Manual page 123

SiUS12-928_A
Troubleshooting
Check No.04
Refer to P.150
Check No.06
Refer to P.152
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check the wiring and piping.
Wrong wiring or
piping?
NO
Check No. 04
Check the electronic expansion
valve.
Functioning?
YES
Check No. 06
Check the outdoor heat
exchanger thermistor.
Does it
conform to the thermistor
characteristic chart?
YES
Check No. 06
Check the room temperature
thermistor.
Does it
conform to the thermistor
characteristic chart?
YES
Change the refrigerant to remove
moisture from the piping (after
drawing a vacuum).
Error again?
NO
YES
NO
NO
NO
YES
Troubleshooting
Activate the wiring error check
mode.
Replace the electronic
expansion valve or coil.
Replace the outdoor heat
exchanger thermistor.
Replace the room temperature
thermistor.
Replace the room temperature
thermistor or indoor heat
exchanger thermistor.
Do the vacuum drying.
Replace the indoor unit PCB
and then start the wiring error
check function.
(R7182)
114